public class Config {

  public String getConfigFile(String filename) {
    String os = System.getProperty("os.name").toLowerCase();

    if (os.contains("win")) {
      return "C:\\" + filename;
    }

    if (os.contains("mac") || os.contains("linux") || os.contains("unix")) {
      return "/usr/local/" + filename;
    }

    throw new UnsupportedOperationException();
  }
}
